Also get 3 tiers of tenant isolation for Web Interface (and it will provision WI for you).

Has enterprise-ready features such as support for app upgrade/user migration.

This will save your admins lots of time when you next need to deliver a hotfix for an app or upgrade to a new version of an app.

Which one is right for you depends on your requirements. At the risk of perhaps over-generalizing I’d say that the Citrix service requires more manual work. Also, Hosted Apps and Desktops is the way to go if you want to really scale. It’s a key component of our Avalon story which we’ve announced at Synergy. With Avalon you’ll be able to really automate your data center by leveraging CloudPortal Services Manager to provision offerings to your users from App Orchestration, which handles complex XenApp and XenDesktop deployments for you.

In the “Private Demo Room” at Synergy Barcelona I did a demo that really showed how much you can automate from end-to-end using the Hosted Apps and Desktops service and App Orchestration, starting with defining your offerings all the way to the end-user logging in to Outlook through Citrix Receiver.

It was a big eye-opener on the simplicity and power that we see in terms of automating your data center!